noun-modifying (irregular)
bluish; tinged with blue
Describes something that has a slight blue tint or hue. Used prenominally.
空が青みがかった色に染まっている。
The sky is dyed a bluish color.
彼女は青みがかった瞳をしている。
She has bluish eyes.
青い is the basic adjective for 'blue', while 青みがかった specifically means 'bluish' or 'tinged with blue', indicating a less pure blue.
青っぽい also means 'bluish', but can carry a slightly negative or informal nuance, whereas 青みがかった is more neutral and descriptive.
Compound of 青み (blueness) + がかった (past form of がかる, 'to be tinged with'). The suffix がかる attaches to nouns to express 'having a touch of that quality'.